source3/smbd/globals.h

   1 /*
   2    Unix SMB/Netbios implementation.
   3    smbd globals
   4    Copyright (C) Stefan Metzmacher 2009
   5    Copyright (C) Jeremy Allison 2010
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "system/select.h"
  22
  23 #if defined(WITH_AIO)
  24 struct aio_extra;
  25 extern struct aio_extra *aio_list_head;
  26 extern struct tevent_signal *aio_signal_event;
  27 extern int aio_pending_size;
  28 extern int outstanding_aio_calls;
  29 #endif
  30
  31 #ifdef USE_DMAPI
  32 struct smbd_dmapi_context;
  33 extern struct smbd_dmapi_context *dmapi_ctx;
  34 #endif
  35
  36 extern bool dfree_broken;
  37
  38 /* how many write cache buffers have been allocated */
  39 extern unsigned int allocated_write_caches;
  40
  41 /* A singleton cache to speed up searching by dev/inode. */
  42 struct fsp_singleton_cache {
  43         files_struct *fsp;
  44         struct file_id id;
  45 };
  46
  47 extern const struct mangle_fns *mangle_fns;
  48
  49 extern unsigned char *chartest;
  50 struct tdb_context;
  51 extern struct tdb_context *tdb_mangled_cache;
  52
  53 /*
  54   this determines how many characters are used from the original filename
  55   in the 8.3 mangled name. A larger value leads to a weaker hash and more collisions.
  56   The largest possible value is 6.
  57 */
  58 extern unsigned mangle_prefix;
  59
  60 struct msg_state;
  61 extern struct msg_state *smbd_msg_state;
  62
  63 extern bool logged_ioctl_message;
  64
  65 extern int trans_num;
  66
  67 extern time_t last_smb_conf_reload_time;
  68 extern time_t last_printer_reload_time;
  69 extern pid_t background_lpq_updater_pid;
  70
  71 /****************************************************************************
  72  structure to hold a linked list of queued messages.
  73  for processing.
  74 ****************************************************************************/
  75 extern uint32_t common_flags2;
  76
  77 extern struct smb_trans_enc_state *partial_srv_trans_enc_ctx;
  78 extern struct smb_trans_enc_state *srv_trans_enc_ctx;
  79
  80 struct sec_ctx {
  81         struct security_unix_token ut;
  82         struct security_token *token;
  83 };
  84 /* A stack of security contexts.  We include the current context as being
  85    the first one, so there is room for another MAX_SEC_CTX_DEPTH more. */
  86 extern struct sec_ctx sec_ctx_stack[MAX_SEC_CTX_DEPTH + 1];
  87 extern int sec_ctx_stack_ndx;
  88 extern bool become_uid_done;
  89 extern bool become_gid_done;
  90
  91 extern connection_struct *last_conn;
  92 extern uint16_t last_flags;
  93
  94 extern uint32_t global_client_caps;
  95
  96 extern uint16_t fnf_handle;
  97
  98 struct conn_ctx {
  99         connection_struct *conn;
 100         uint16 vuid;
 101 };
 102 /* A stack of current_user connection contexts. */
 103 extern struct conn_ctx conn_ctx_stack[MAX_SEC_CTX_DEPTH];
 104 extern int conn_ctx_stack_ndx;
 105
 106 struct vfs_init_function_entry;
 107 extern struct vfs_init_function_entry *backends;
 108 extern char *sparse_buf;
 109 extern char *LastDir;
 110
 111 /* Current number of oplocks we have outstanding. */
 112 extern int32_t exclusive_oplocks_open;
 113 extern int32_t level_II_oplocks_open;
 114 extern struct kernel_oplocks *koplocks;
 115
 116 extern int am_parent;
 117 extern struct memcache *smbd_memcache_ctx;
 118 extern bool exit_firsttime;
 119 struct child_pid;
 120 extern struct child_pid *children;
 121 extern int num_children;
 122
 123 struct tstream_context;
 124 struct smbd_smb2_request;
 125 struct smbd_smb2_session;
 126 struct smbd_smb2_tcon;
 127
 128 DATA_BLOB negprot_spnego(TALLOC_CTX *ctx, struct smbd_server_connection *sconn);
 129
 130 void smbd_lock_socket(struct smbd_server_connection *sconn);
 131 void smbd_unlock_socket(struct smbd_server_connection *sconn);
 132
 133 NTSTATUS smbd_do_locking(struct smb_request *req,
 134                          files_struct *fsp,
 135                          uint8_t type,
 136                          int32_t timeout,
 137                          uint16_t num_ulocks,
 138                          struct smbd_lock_element *ulocks,
 139                          uint16_t num_locks,
 140                          struct smbd_lock_element *locks,
 141                          bool *async);
 142
 143 NTSTATUS smbd_do_qfilepathinfo(connection_struct *conn,
 144                                TALLOC_CTX *mem_ctx,
 145                                uint16_t info_level,
 146                                files_struct *fsp,
 147                                struct smb_filename *smb_fname,
 148                                bool delete_pending,
 149                                struct timespec write_time_ts,
 150                                struct ea_list *ea_list,
 151                                int lock_data_count,
 152                                char *lock_data,
 153                                uint16_t flags2,
 154                                unsigned int max_data_bytes,
 155                                char **ppdata,
 156                                unsigned int *pdata_size);
 157
 158 NTSTATUS smbd_do_setfilepathinfo(connection_struct *conn,
 159                                 struct smb_request *req,
 160                                 TALLOC_CTX *mem_ctx,
 161                                 uint16_t info_level,
 162                                 files_struct *fsp,
 163                                 struct smb_filename *smb_fname,
 164                                 char **ppdata, int total_data,
 165                                 int *ret_data_size);
 166
 167 NTSTATUS smbd_do_qfsinfo(connection_struct *conn,
 168                          TALLOC_CTX *mem_ctx,
 169                          uint16_t info_level,
 170                          uint16_t flags2,
 171                          unsigned int max_data_bytes,
 172                          char **ppdata,
 173                          int *ret_data_len);
 174
 175 bool smbd_dirptr_get_entry(TALLOC_CTX *ctx,
 176                            struct dptr_struct *dirptr,
 177                            const char *mask,
 178                            uint32_t dirtype,
 179                            bool dont_descend,
 180                            bool ask_sharemode,
 181                            bool (*match_fn)(TALLOC_CTX *ctx,
 182                                             void *private_data,
 183                                             const char *dname,
 184                                             const char *mask,
 185                                             char **_fname),
 186                            bool (*mode_fn)(TALLOC_CTX *ctx,
 187                                            void *private_data,
 188                                            struct smb_filename *smb_fname,
 189                                            uint32_t *_mode),
 190                            void *private_data,
 191                            char **_fname,
 192                            struct smb_filename **_smb_fname,
 193                            uint32_t *_mode,
 194                            long *_prev_offset);
 195
 196 bool smbd_dirptr_lanman2_entry(TALLOC_CTX *ctx,
 197                                connection_struct *conn,
 198                                struct dptr_struct *dirptr,
 199                                uint16 flags2,
 200                                const char *path_mask,
 201                                uint32 dirtype,
 202                                int info_level,
 203                                int requires_resume_key,
 204                                bool dont_descend,
 205                                bool ask_sharemode,
 206                                uint8_t align,
 207                                bool do_pad,
 208                                char **ppdata,
 209                                char *base_data,
 210                                char *end_data,
 211                                int space_remaining,
 212                                bool *out_of_space,
 213                                bool *got_exact_match,
 214                                int *_last_entry_off,
 215                                struct ea_list *name_list);
 216
 217 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
 218                                     const struct smb_filename *smb_fname,
 219                                     bool file_existed,
 220                                     uint32_t access_mask,
 221                                     uint32_t *access_mask_out);
 222
 223 void smbd_notify_cancel_by_smbreq(const struct smb_request *smbreq);
 224
 225 void smbd_server_connection_terminate_ex(struct smbd_server_connection *sconn,
 226                                          const char *reason,
 227                                          const char *location);
 228 #define smbd_server_connection_terminate(sconn, reason) \
 229         smbd_server_connection_terminate_ex(sconn, reason, __location__)
 230
 231 struct server_id sconn_server_id(const struct smbd_server_connection *sconn);
 232
 233 const char *smb2_opcode_name(uint16_t opcode);
 234 bool smbd_is_smb2_header(const uint8_t *inbuf, size_t size);
 235
 236 void reply_smb2002(struct smb_request *req, uint16_t choice);
 237 void reply_smb20ff(struct smb_request *req, uint16_t choice);
 238 void smbd_smb2_first_negprot(struct smbd_server_connection *sconn,
 239                              const uint8_t *inbuf, size_t size);
 240
 241 NTSTATUS smbd_smb2_request_error_ex(struct smbd_smb2_request *req,
 242                                     NTSTATUS status,
 243                                     DATA_BLOB *info,
 244                                     const char *location);
 245 #define smbd_smb2_request_error(req, status) \
 246         smbd_smb2_request_error_ex(req, status, NULL, __location__)
 247 NTSTATUS smbd_smb2_request_done_ex(struct smbd_smb2_request *req,
 248                                    NTSTATUS status,
 249                                    DATA_BLOB body, DATA_BLOB *dyn,
 250                                    const char *location);
 251 #define smbd_smb2_request_done(req, body, dyn) \
 252         smbd_smb2_request_done_ex(req, NT_STATUS_OK, body, dyn, __location__)
 253
 254 NTSTATUS smbd_smb2_send_oplock_break(struct smbd_server_connection *sconn,
 255                                      uint64_t file_id_persistent,
 256                                      uint64_t file_id_volatile,
 257                                      uint8_t oplock_level);
 258
 259 NTSTATUS smbd_smb2_request_pending_queue(struct smbd_smb2_request *req,
 260                                          struct tevent_req *subreq,
 261                                          uint32_t defer_time);
 262
 263 struct smb_request *smbd_smb2_fake_smb_request(struct smbd_smb2_request *req);
 264 void remove_smb2_chained_fsp(files_struct *fsp);
 265
 266 NTSTATUS smbd_smb2_request_verify_sizes(struct smbd_smb2_request *req,
 267                                         size_t expected_body_size);
 268
 269 NTSTATUS smbd_smb2_request_process_negprot(struct smbd_smb2_request *req);
 270 NTSTATUS smbd_smb2_request_process_sesssetup(struct smbd_smb2_request *req);
 271 NTSTATUS smbd_smb2_request_process_logoff(struct smbd_smb2_request *req);
 272 NTSTATUS smbd_smb2_request_process_tcon(struct smbd_smb2_request *req);
 273 NTSTATUS smbd_smb2_request_process_tdis(struct smbd_smb2_request *req);
 274 NTSTATUS smbd_smb2_request_process_create(struct smbd_smb2_request *req);
 275 NTSTATUS smbd_smb2_request_process_close(struct smbd_smb2_request *req);
 276 NTSTATUS smbd_smb2_request_process_flush(struct smbd_smb2_request *req);
 277 NTSTATUS smbd_smb2_request_process_read(struct smbd_smb2_request *req);
 278 NTSTATUS smb2_read_complete(struct tevent_req *req, ssize_t nread, int err);
 279 NTSTATUS smbd_smb2_request_process_write(struct smbd_smb2_request *req);
 280 NTSTATUS smb2_write_complete(struct tevent_req *req, ssize_t nwritten, int err);
 281 NTSTATUS smbd_smb2_request_process_lock(struct smbd_smb2_request *req);
 282 NTSTATUS smbd_smb2_request_process_ioctl(struct smbd_smb2_request *req);
 283 NTSTATUS smbd_smb2_request_process_keepalive(struct smbd_smb2_request *req);
 284 NTSTATUS smbd_smb2_request_process_find(struct smbd_smb2_request *req);
 285 NTSTATUS smbd_smb2_request_process_notify(struct smbd_smb2_request *req);
 286 NTSTATUS smbd_smb2_request_process_getinfo(struct smbd_smb2_request *req);
 287 NTSTATUS smbd_smb2_request_process_setinfo(struct smbd_smb2_request *req);
 288 NTSTATUS smbd_smb2_request_process_break(struct smbd_smb2_request *req);
 289 NTSTATUS smbd_smb2_request_dispatch(struct smbd_smb2_request *req);
 290 void smbd_smb2_request_dispatch_immediate(struct tevent_context *ctx,
 291                                 struct tevent_immediate *im,
 292                                 void *private_data);
 293
 294 /* SMB1 -> SMB2 glue. */
 295 void send_break_message_smb2(files_struct *fsp, int level);
 296 struct blocking_lock_record *get_pending_smb2req_blr(struct smbd_smb2_request *smb2req);
 297 bool push_blocking_lock_request_smb2( struct byte_range_lock *br_lck,
 298                                 struct smb_request *req,
 299                                 files_struct *fsp,
 300                                 int lock_timeout,
 301                                 int lock_num,
 302                                 uint64_t smblctx,
 303                                 enum brl_type lock_type,
 304                                 enum brl_flavour lock_flav,
 305                                 uint64_t offset,
 306                                 uint64_t count,
 307                                 uint64_t blocking_smblctx);
 308 void process_blocking_lock_queue_smb2(
 309         struct smbd_server_connection *sconn, struct timeval tv_curr);
 310 void cancel_pending_lock_requests_by_fid_smb2(files_struct *fsp,
 311                         struct byte_range_lock *br_lck,
 312                         enum file_close_type close_type);
 313 /* From smbd/smb2_create.c */
 314 int map_smb2_oplock_levels_to_samba(uint8_t in_oplock_level);
 315 bool get_deferred_open_message_state_smb2(struct smbd_smb2_request *smb2req,
 316                         struct timeval *p_request_time,
 317                         void **pp_state);
 318 bool open_was_deferred_smb2(struct smbd_server_connection *sconn,
 319                             uint64_t mid);
 320 void remove_deferred_open_message_smb2(
 321         struct smbd_server_connection *sconn, uint64_t mid);
 322 void schedule_deferred_open_message_smb2(
 323         struct smbd_server_connection *sconn, uint64_t mid);
 324 bool push_deferred_open_message_smb2(struct smbd_smb2_request *smb2req,
 325                         struct timeval request_time,
 326                         struct timeval timeout,
 327                         struct file_id id,
 328                         char *private_data,
 329                         size_t priv_len);
 330
 331 struct smbd_smb2_request {
 332         struct smbd_smb2_request *prev, *next;
 333
 334         TALLOC_CTX *mem_pool;
 335         struct smbd_smb2_request **parent;
 336
 337         struct smbd_server_connection *sconn;
 338
 339         /* the session the request operates on, maybe NULL */
 340         struct smbd_smb2_session *session;
 341         uint64_t last_session_id;
 342
 343         /* the tcon the request operates on, maybe NULL */
 344         struct smbd_smb2_tcon *tcon;
 345         uint32_t last_tid;
 346
 347         int current_idx;
 348         bool do_signing;
 349         struct tevent_timer *async_te;
 350         bool cancelled;
 351         bool compound_related;
 352
 353         /* fake smb1 request. */
 354         struct smb_request *smb1req;
 355         struct files_struct *compat_chain_fsp;
 356
 357         NTSTATUS next_status;
 358
 359         /*
 360          * The sub request for async backend calls.
 361          * This is used for SMB2 Cancel.
 362          */
 363         struct tevent_req *subreq;
 364
 365         struct {
 366                 /* the NBT header is not allocated */
 367                 uint8_t nbt_hdr[4];
 368                 /*
 369                  * vector[0] NBT
 370                  * .
 371                  * vector[1] SMB2
 372                  * vector[2] fixed body
 373                  * vector[3] dynamic body
 374                  * .
 375                  * .
 376                  * .
 377                  * vector[4] SMB2
 378                  * vector[5] fixed body
 379                  * vector[6] dynamic body
 380                  * .
 381                  * .
 382                  * .
 383                  */
 384                 struct iovec *vector;
 385                 int vector_count;
 386         } in;
 387         struct {
 388                 /* the NBT header is not allocated */
 389                 uint8_t nbt_hdr[4];
 390                 /*
 391                  * vector[0] NBT
 392                  * .
 393                  * vector[1] SMB2
 394                  * vector[2] fixed body
 395                  * vector[3] dynamic body
 396                  * .
 397                  * .
 398                  * .
 399                  * vector[4] SMB2
 400                  * vector[5] fixed body
 401                  * vector[6] dynamic body
 402                  * .
 403                  * .
 404                  * .
 405                  */
 406                 struct iovec *vector;
 407                 int vector_count;
 408         } out;
 409 };
 410
 411 struct smbd_server_connection;
 412
 413 struct smbd_smb2_session {
 414         struct smbd_smb2_session *prev, *next;
 415         struct smbd_server_connection *sconn;
 416         NTSTATUS status;
 417         uint64_t vuid;
 418         struct auth_ntlmssp_state *auth_ntlmssp_state;
 419         struct auth_session_info *session_info;
 420         DATA_BLOB session_key;
 421         bool do_signing;
 422
 423         user_struct *compat_vuser;
 424
 425         struct {
 426                 /* an id tree used to allocate tids */
 427                 struct idr_context *idtree;
 428
 429                 /* this is the limit of tid values for this connection */
 430                 uint32_t limit;
 431
 432                 struct smbd_smb2_tcon *list;
 433         } tcons;
 434 };
 435
 436 struct smbd_smb2_tcon {
 437         struct smbd_smb2_tcon *prev, *next;
 438         struct smbd_smb2_session *session;
 439         uint32_t tid;
 440         int snum;
 441         connection_struct *compat_conn;
 442 };
 443
 444 struct pending_message_list;
 445 struct pending_auth_data;
 446
 447 struct smbd_server_connection {
 448         int sock;
 449         const struct tsocket_address *local_address;
 450         const struct tsocket_address *remote_address;
 451         const char *remote_hostname;
 452         struct tevent_context *ev_ctx;
 453         struct messaging_context *msg_ctx;
 454         struct {
 455                 bool got_session;
 456         } nbt;
 457         bool using_smb2;
 458         int trans_num;
 459
 460         /*
 461          * Cache for calling poll(2) to avoid allocations in our
 462          * central event loop
 463          */
 464         struct pollfd *pfds;
 465
 466         struct files_struct *files;
 467         struct bitmap *file_bmap;
 468         int real_max_open_files;
 469         int files_used;
 470         struct fsp_singleton_cache fsp_fi_cache;
 471         unsigned long file_gen_counter;
 472         int first_file;
 473
 474         /* Try GENSEC hook */
 475         bool use_gensec_hook;
 476
 477         /* number of open connections (tcons) */
 478         int num_tcons_open;
 479
 480         struct pending_message_list *deferred_open_queue;
 481
 482
 483         /* open directory handles. */
 484         struct {
 485                 struct bitmap *dptr_bmap;
 486                 struct dptr_struct *dirptrs;
 487                 int dirhandles_open;
 488         } searches;
 489
 490         uint64_t num_requests;
 491
 492         struct {
 493                 struct fd_event *fde;
 494
 495                 struct {
 496                         /*
 497                          * fd for the fcntl lock mutexing access to our sock
 498                          */
 499                         int socket_lock_fd;
 500
 501                         /*
 502                          * fd for the trusted pipe from
 503                          * echo handler child
 504                          */
 505                         int trusted_fd;
 506
 507                         /*
 508                          * fde for the trusted_fd
 509                          */
 510                         struct fd_event *trusted_fde;
 511
 512                         /*
 513                          * Reference count for the fcntl lock to
 514                          * allow recursive locks.
 515                          */
 516                         int ref_count;
 517                 } echo_handler;
 518
 519                 struct {
 520                         bool encrypted_passwords;
 521                         bool spnego;
 522                         struct auth_context *auth_context;
 523                         bool done;
 524                         /*
 525                          * Size of the data we can receive. Set by us.
 526                          * Can be modified by the max xmit parameter.
 527                          */
 528                         int max_recv;
 529                 } negprot;
 530
 531                 struct {
 532                         uint16_t client_major;
 533                         uint16_t client_minor;
 534                         uint32_t client_cap_low;
 535                         uint32_t client_cap_high;
 536                 } unix_info;
 537
 538                 struct {
 539                         bool done_sesssetup;
 540                         /*
 541                          * Size of data we can send to client. Set
 542                          *  by the client for all protocols above CORE.
 543                          *  Set by us for CORE protocol.
 544                          */
 545                         int max_send;
 546                         uint16_t last_session_tag;
 547
 548                         /* users from session setup */
 549                         char *session_userlist;
 550                         /* workgroup from session setup. */
 551                         char *session_workgroup;
 552                         /*
 553                          * this holds info on user ids that are already
 554                          * validated for this VC
 555                          */
 556                         user_struct *validated_users;
 557                         uint16_t next_vuid;
 558                         int num_validated_vuids;
 559                 } sessions;
 560                 struct {
 561                         connection_struct *Connections;
 562                         /* number of open connections */
 563                         struct bitmap *bmap;
 564                 } tcons;
 565                 struct smb_signing_state *signing_state;
 566                 /* List to store partial SPNEGO auth fragments. */
 567                 struct pending_auth_data *pd_list;
 568
 569                 struct notify_mid_map *notify_mid_maps;
 570
 571                 struct {
 572                         /* dlink list we store pending lock records on. */
 573                         struct blocking_lock_record *blocking_lock_queue;
 574                         /* dlink list we move cancelled lock records onto. */
 575                         struct blocking_lock_record *blocking_lock_cancelled_queue;
 576
 577                         /* The event that makes us process our blocking lock queue */
 578                         struct timed_event *brl_timeout;
 579
 580                         bool blocking_lock_unlock_state;
 581                         bool blocking_lock_cancel_state;
 582                 } locks;
 583         } smb1;
 584         struct {
 585                 struct tevent_queue *recv_queue;
 586                 struct tevent_queue *send_queue;
 587                 struct tstream_context *stream;
 588                 bool negprot_2ff;
 589                 struct {
 590                         /* an id tree used to allocate vuids */
 591                         /* this holds info on session vuids that are already
 592                          * validated for this VC */
 593                         struct idr_context *idtree;
 594
 595                         /* this is the limit of vuid values for this connection */
 596                         uint64_t limit;
 597
 598                         struct smbd_smb2_session *list;
 599                 } sessions;
 600                 struct {
 601                         /* The event that makes us process our blocking lock queue */
 602                         struct timed_event *brl_timeout;
 603                         bool blocking_lock_unlock_state;
 604                 } locks;
 605                 struct smbd_smb2_request *requests;
 606                 uint64_t seqnum_low;
 607                 uint32_t credits_granted;
 608                 uint32_t max_credits;
 609                 uint32_t max_trans;
 610                 uint32_t max_read;
 611                 uint32_t max_write;
 612                 struct bitmap *credits_bitmap;
 613                 bool compound_related_in_progress;
 614         } smb2;
 615 };
 616
 617 extern struct smbd_server_connection *smbd_server_conn;
 618
 619 struct smbd_server_connection *msg_ctx_to_sconn(struct messaging_context *msg_ctx);
 620
 621 void smbd_init_globals(void);